in more than one file should be put in globals/. Others should be put at the top of the file where they're used. • List `@extend`s first. • List "regular" styles next in alphabetical order. • List `@include`s next. • Nested Selectors last, in alphabetical order. • Nothing goes after the nested stuff. And the same order as above within the nested selector would apply. • All Vendor Prefixes Use @mixins. • Maximum Nesting: Three Levels Deep. If you find yourself going further, think about reorganizing your rules (either the specificity needed, or the layout of the nesting). • Maximum Nesting: 50 Lines. • Global and Section-Specific Sass Files Are just Table of Contents. • List Vendor/Global Dependancies First, Then Author Dependancies, Then Patterns, Then Parts